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diff --git a/src/translate/trans_analyzes.ads b/src/translate/trans_analyzes.ads
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+--  Analysis for translation.
+--  Copyright (C) 2009 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
+--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+--  for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with GCC; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+
+with Iirs; use Iirs;
+
+package Trans_Analyzes is
+   --  Extract a list of drivers from PROC.
+   function Extract_Drivers (Proc : Iir) return Iir_List;
+
+   --  Free the list.
+   procedure Free_Drivers_List (List : in out Iir_List);
+
+   --  Dump list of drivers (LIST) for process PROC.
+   procedure Dump_Drivers (Proc : Iir; List : Iir_List);
+
+end Trans_Analyzes;